Ctjbtaijir-bod



G. A- CARLSON.

CURIMN ROD.

APPLICATION FILED OCT. 28. I918.

Patented Sept. 9, 1919.

UNITED STATES PATENT OFFICE.

GUSTAIF A. OLIRLSON, OF CHICAGO, ILLINOIS, AS$IGNOB 1'0 THE 'BOYE NEEDLECOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF IDLIII'OIS.

CURTAIN 8017.

Specification of Letters Patent.

Patented Sept. 9, 1mm.

To all whom it may concern:

Be it known that Gusrar A. CARISON, a citizen of Sweden, who has takenout first papers for citizenship in the United States,

residing at Chicago, in the county of Cook and State of Illinois, hasinvented a new and useful Improvement in Curtain-Rods, of which thefollowing is a specification.

This invention relates particularly to flexible curtain-rods, such asare commonly employed for sash-curtains.

Curtain-rods of the type here referred to comprise close-wound springwire coils. Such flexible rods are usually made of closely coiled pianoSpring wire. At the present time, such wire is quite expensive anddiflicult to obtain; and, moreover, when a curtain-rod is constructedwholly of coiled wire, it is likely to be more flexible than 15desirable.

The primary object-0f the present 1nven-. tion is to provide aconstruction which enables the desirable features of the closewoundspring wire coil to be retained, and which enables the objectionablefeatures to be obviated.

This purpose is accomplished by means or the invention illustrated inthe accompany ing' drawing, in which- Figure 1 represents a broken planview of a. window-frame, or sash, equipped with a curtain-rod (shownbrokenly) constructed in accordance with my invention; Fig. 2, a brokenelevational view of the same; Fig. 3, a plan view of one of theclose-wound wire coils employed in the construction; Fig. 4, aperspective view of a sleeve employed; Fig. 5, a fragmentary view of aheavy wire or intermediate rod-section employed in the construction;Fig. 6, a broken sectional view illustrating the manner in which theends of the intermediate rod-section are joined to the wire coils; Fig.7, a view of a slightly modified form of intermediate rod-section; andFig. 8, a view of a further slight modification In the constructionillustrated, A represents a window-frame, or sash; B, a pair of bracketsapplied to said frame; and C, an improved curtain-rod mounted in thecrack ets B.

The brackets B may be of any suitable form. The brackets are preferablyprovided with sockets 1 adapted to engage grippers with which theextremities of the curtainrod preferably are equipped.

The curtain-rod preferably comprises an intermediate rod-section, orpiece of comparatively stifl wire :2; a pair of resilient rod-sections,or wire coils, 3; sleeves 4i adapted to serve as clamping connectionsbetween the inner ends of the coils 3 and the extremi ties of theintermediate rod-section 2, which are extended into the coils; andgrippers 5 which a-re'applied to the outer ends of the coils Zvandintroduced into the sockets 1 of the brackets B.

It may be stated here that the grippers 5 are adapted to hold thecurtain-rod C under tension between the brackets B in the mannerdescribed in my copending application No. 259,966, filed of even dateherewith. The intermediate-rod-scction 2-has its endportions providedwith slight oli-sets, or crimps, 6. The rod-section 2 is of the properdiameter to fit snugly in the end-portion of the coil 3. When theendportion of the rod :2 is introduced into the end-portion of the coilin the manner shown in Fi 6, it produces a curvature of the coil; andwhen the sleeve 4: is slipped into position to embrace the end-portionof the coil and the inserted portion of the rod-section 2, the effect isto cause a wcdging action within the sleeve. In other words, the sleevei, which may be a split sleeve formed from sheetmetal, acts as aclamping sleeve, which firmly secures the end-portion of the rodsection2 to the coil-spring into which it is introduced. The gripping action issuch as to prevent disengagement when the curtainrod is placed undertension, as occurs when the I,ggrippers 5 are introduced into thebrackets If it be desired to separate the rodscction 2 from thecoil-spring, this may be eficcted by tapping the sleeve endwise until itceases to encircle the portion of the coil which contains the crimped oroil-set portion of the wire, after which the wire may be readilywithdrawn from the coil- -It will be understood that the constructiondescribed provides for adjustment of the length of the curtain-rod whenthe curtain-rod is first installed, enabling the curtain-rod to beplaced under just the desired tension. In case the coils are wcakcnedbyuseand it becomes necessary to shorten the V curtain-rod, this may beaccomplished by re-adjustment of the coils upon the ends of theintermediate rod-section, the sleeve being first removed and then forcedagain to the clamping position.

The construction described possesses the advantage that it inquires theuse of only comparatively small sections of piano steel wire for formingthe coils. It also possesses the advantage of obviating undueflexibility of the curtain-rod while still retaining the desirablefeature of tension upon the curtain-rod. The intermediate section 2 maybe of strong stifi wire. In practice, the wire coils need not be morethan a few inches in length, even in a curtain-rod which is upward ofthirty inches in length; In such a curtain-rod, for example, it willsufice to employ coils of about four inches in length, or even smaller.

In Fig. 7, 2 indicates an intermediate rod-section having a slightlydill'crent oliset 6? at the end-portion adapted to enter thecoil-spring.

In Fig. 8, 2* represents an intermediate rod-section having a slightlyenlarged portion 6", formed by slightly flattening the wire. In thiscase, the wire must be slightly smaller than the coil spring which itenters, and the embracing sleeve mustbe suficiently small in diameter toforce the coils closely against the walls of the enlargement. In eachcase, the object is to produce such a deformation in the portion of thewire which is introduced into the coil as to cause a clamping orgripping action when the sleeve is caused to embrace the coil and theinserted portion of the wlre-rod.

The foregoing detailed description has,

be understood therefrom, but the appended termediate section.

2. A. curtain-rod comprising a pair of coiled wire sections, anintermediate relatively stiif rod-section having its end-portionsextending into said first-named sections, and clamping means embracingthe joints between said intermediate section and the coiled wiresections and securing said parts together.

3. A curtain-rod comprising a coiled wire section, a wire-rod sectionextending; thereinto, and a sleeve clamping said sections together.

'4. A. curtain-rod comprising a coiled wire section, a wire-rod sectionhaving an endportion extending into said coiled wire sec tion andprovided with a deformation, and a sleeve embracing said members at thejoint and serving to secure said members together.

5. A curtain-rod comprising a coiled wire section, a wire-rod sectionhaving an endportion extending thereinto and provided with a bend, and asleeve embracing said sections at the joint and securing them. togather.

(3. A curtain-rod comprising a pair of coiled wire end-sections anintermediate wire rod section having portions extendhig' into saidcoiled wire sections and provided therein with. deformations, clampingsleeves embracing said sections at the joints and securing said sectionstogether, and bracketattaching' means associated with the outerend-portions of said coiled wire sections.

' GUSTAF A. CARLSON.

